4. Co-administration of valganciclovir with didanosine, Mycophenolate mofetil, and bone marrow suppression drugs (e.g., dapsone, pentamidine, flucytosine, vincristine, vinblastine, adriamycin, amphotericin B, nucleoside analogues, hydroxyurea) would need to be monitored more seriously because of their toxicity might increase